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Remove some PropertyDeclaration cloning.

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This commit is contained in:
Simon Sapin 2015-07-23 01:13:06 +02:00
parent d2bd070dc3
commit 06ba62b012
4 changed files with 63 additions and 48 deletions
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49
components/script/dom/cssstyledeclaration.rs
View file

@ -21,6 +21,7 @@ use style::properties::PropertyDeclaration;
use std::ascii::AsciiExt;
use std::borrow::ToOwned;
use std::cell::Ref;
// http://dev.w3.org/csswg/cssom/#the-cssstyledeclaration-interface
#[dom_struct]
@ -50,7 +51,7 @@ macro_rules! css_properties(
);
);
fn serialize_list(list: &Vec<PropertyDeclaration>) -> DOMString {
fn serialize_list(list: &[Ref<PropertyDeclaration>]) -> DOMString {
list.iter().fold(String::new(), |accum, ref declaration| {
accum + &declaration.value() + " "
})
@ -78,25 +79,24 @@ impl CSSStyleDeclaration {
}
trait PrivateCSSStyleDeclarationHelpers {
fn get_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
fn get_important_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
fn get_computed_style(self, property: &Atom) -> Option<DOMString>;
fn get_declaration(&self, property: &Atom) -> Option<Ref<PropertyDeclaration>>;
fn get_important_declaration(&self, property: &Atom) -> Option<Ref<PropertyDeclaration>>;
}
impl<'a> PrivateCSSStyleDeclarationHelpers for &'a CSSStyleDeclaration {
fn get_declaration(self, property: &Atom) -> Option<PropertyDeclaration> {
let owner = self.owner.root();
let element = ElementCast::from_ref(owner.r());
element.get_inline_style_declaration(property).map(|decl| decl.clone())
impl PrivateCSSStyleDeclarationHelpers for HTMLElement {
fn get_declaration(&self, property: &Atom) -> Option<Ref<PropertyDeclaration>> {
let element = ElementCast::from_ref(self);
element.get_inline_style_declaration(property)
}
fn get_important_declaration(self, property: &Atom) -> Option<PropertyDeclaration> {
let owner = self.owner.root();
let element = ElementCast::from_ref(owner.r());
element.get_important_inline_style_declaration(property).map(|decl| decl.clone())
fn get_important_declaration(&self, property: &Atom) -> Option<Ref<PropertyDeclaration>> {
let element = ElementCast::from_ref(self);
element.get_important_inline_style_declaration(property)
}
}
fn get_computed_style(self, property: &Atom) -> Option<DOMString> {
impl CSSStyleDeclaration {
fn get_computed_style(&self, property: &Atom) -> Option<DOMString> {
let owner = self.owner.root();
let node = NodeCast::from_ref(owner.r());
if !node.is_in_doc() {
@ -144,6 +144,8 @@ impl<'a> CSSStyleDeclarationMethods for &'a CSSStyleDeclaration {
// https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertyvalue
fn GetPropertyValue(self, property: DOMString) -> DOMString {
let owner = self.owner.root();
// Step 1
let property = Atom::from_slice(&property.to_ascii_lowercase());
@ -161,7 +163,7 @@ impl<'a> CSSStyleDeclarationMethods for &'a CSSStyleDeclaration {
// Step 2.2
for longhand in longhand_properties.iter() {
// Step 2.2.1
let declaration = self.get_declaration(&Atom::from_slice(&longhand));
let declaration = owner.get_declaration(&Atom::from_slice(&longhand));
// Step 2.2.2 & 2.2.3
match declaration {
@ -175,11 +177,12 @@ impl<'a> CSSStyleDeclarationMethods for &'a CSSStyleDeclaration {
}
// Step 3 & 4
if let Some(ref declaration) = self.get_declaration(&property) {
declaration.value()
} else {
"".to_owned()
}
// FIXME: redundant let binding https://github.com/rust-lang/rust/issues/22252
let result = match owner.get_declaration(&property) {
Some(declaration) => declaration.value(),
None => "".to_owned(),
};
result
}
// https://dev.w3.org/csswg/cssom/#dom-cssstyledeclaration-getpropertypriority
@ -198,9 +201,13 @@ impl<'a> CSSStyleDeclarationMethods for &'a CSSStyleDeclaration {
return "important".to_owned();
}
// Step 3
} else if self.get_important_declaration(&property).is_some() {
} else {
// FIXME: extra let binding https://github.com/rust-lang/rust/issues/22323
let owner = self.owner.root();
if owner.get_important_declaration(&property).is_some() {
return "important".to_owned();
}
}
// Step 4
"".to_owned()

35
components/script/dom/element.rs
View file

@ -584,8 +584,8 @@ pub trait ElementHelpers<'a> {
fn remove_inline_style_property(self, property: &str);
fn update_inline_style(self, property_decl: PropertyDeclaration, style_priority: StylePriority);
fn set_inline_style_property_priority(self, properties: &[&str], style_priority: StylePriority);
fn get_inline_style_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
fn get_important_inline_style_declaration(self, property: &Atom) -> Option<PropertyDeclaration>;
fn get_inline_style_declaration(self, property: &Atom) -> Option<Ref<'a, PropertyDeclaration>>;
fn get_important_inline_style_declaration(self, property: &Atom) -> Option<Ref<'a, PropertyDeclaration>>;
fn serialize(self, traversal_scope: TraversalScope) -> Fallible<DOMString>;
fn get_root_element(self) -> Root<Element>;
fn lookup_prefix(self, namespace: Namespace) -> Option<DOMString>;
@ -660,7 +660,7 @@ impl<'a> ElementHelpers<'a> for &'a Element {
.iter()
.position(|decl| decl.name() == property);
if let Some(index) = index {
Arc::make_unique(&mut declarations.normal).remove(index);
Arc::get_mut(&mut declarations.normal).unwrap().remove(index);
return;
}
@ -668,7 +668,7 @@ impl<'a> ElementHelpers<'a> for &'a Element {
.iter()
.position(|decl| decl.name() == property);
if let Some(index) = index {
Arc::make_unique(&mut declarations.important).remove(index);
Arc::get_mut(&mut declarations.important).unwrap().remove(index);
return;
}
}
@ -678,10 +678,14 @@ impl<'a> ElementHelpers<'a> for &'a Element {
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let existing_declarations = if style_priority == StylePriority::Important {
Arc::make_unique(&mut declarations.important)
&mut declarations.important
} else {
Arc::make_unique(&mut declarations.normal)
&mut declarations.normal
};
// Element is the only owner of the Arc’s for its style attribute,
// except during selector matching.
// But selector matching does not run concurrently with script.
let existing_declarations = Arc::get_mut(existing_declarations).unwrap();
for declaration in existing_declarations.iter_mut() {
if declaration.name() == property_decl.name() {
@ -713,8 +717,11 @@ impl<'a> ElementHelpers<'a> for &'a Element {
} else {
(&mut declarations.normal, &mut declarations.important)
};
let from = Arc::make_unique(from);
let to = Arc::make_unique(to);
// Element is the only owner of the Arc’s for its style attribute,
// except during selector matching.
// But selector matching does not run concurrently with script.
let from = Arc::get_mut(from).unwrap();
let to = Arc::get_mut(to).unwrap();
let mut new_from = Vec::new();
for declaration in from.drain(..) {
if properties.contains(&declaration.name()) {
@ -727,24 +734,24 @@ impl<'a> ElementHelpers<'a> for &'a Element {
}
}
fn get_inline_style_declaration(self, property: &Atom) -> Option<PropertyDeclaration> {
let inline_declarations = self.style_attribute.borrow();
fn get_inline_style_declaration(self, property: &Atom) -> Option<Ref<'a, PropertyDeclaration>> {
Ref::filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.normal
.iter()
.chain(declarations.important.iter())
.find(|decl| decl.matches(&property))
.map(|decl| decl.clone())
})
})
}
fn get_important_inline_style_declaration(self, property: &Atom) -> Option<PropertyDeclaration> {
let inline_declarations = self.style_attribute.borrow();
fn get_important_inline_style_declaration(self, property: &Atom) -> Option<Ref<'a, PropertyDeclaration>> {
Ref::filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.important
.iter()
.find(|decl| decl.matches(&property))
.map(|decl| decl.clone())
})
})
}

1
components/script/lib.rs
View file

@ -10,6 +10,7 @@
#![feature(borrow_state)]
#![feature(box_raw)]
#![feature(box_syntax)]
#![feature(cell_extras)]
#![feature(core)]
#![feature(core_intrinsics)]
#![feature(custom_attribute)]

6
components/style/properties.mako.rs
View file

@ -5583,9 +5583,9 @@ pub fn parse_property_declaration_list(context: &ParserContext, input: &mut Pars
match declaration {
Ok((results, important)) => {
if important {
important_declarations.push_all(&results);
important_declarations.extend(results);
} else {
normal_declarations.push_all(&results);
normal_declarations.extend(results);
}
}
Err(range) => {
@ -5669,7 +5669,7 @@ impl<T: ToCss> DeclaredValue<T> {
}
}
#[derive(Clone, PartialEq)]
#[derive(PartialEq)]
pub enum PropertyDeclaration {
% for property in LONGHANDS:
${property.camel_case}(DeclaredValue<longhands::${property.ident}::SpecifiedValue>),